implemented unified operational timeline. situational awareness 'what changed before it broke?'

frontend/src/App.tsx

@@ -38,6 +38,7 @@ const PipelinesPage     = lazy(() => import('./pages/PipelinesPage'))
 const PipelineRunPage      = lazy(() => import('./pages/PipelineRunPage'))
 const RepoPipelinesPage    = lazy(() => import('./pages/RepoPipelinesPage'))
 const EnvironmentsPage     = lazy(() => import('./pages/EnvironmentsPage'))
+const RepoTimelinePage     = lazy(() => import('./pages/RepoTimelinePage'))
 const ProfilePage       = lazy(() => import('./pages/ProfilePage'))
 const ExplorePage       = lazy(() => import('./pages/ExplorePage'))
 const SettingsPage      = lazy(() => import('./pages/SettingsPage'))
@@ -87,6 +88,7 @@ export default function App() {
               <Route path="repos/:owner/:repo/pulls/:prId"         element={<S><PRDetailPage /></S>} />
               <Route path="repos/:owner/:repo/pipelines"           element={<S><RepoPipelinesPage /></S>} />
               <Route path="repos/:owner/:repo/environments"        element={<S><EnvironmentsPage /></S>} />
+              <Route path="repos/:owner/:repo/timeline"           element={<S><RepoTimelinePage /></S>} />
               <Route path="repos/:owner/:repo/runs/:runId"         element={<S><PipelineRunPage /></S>} />
 
               <Route path="starred"   element={<S><StarredPage /></S>} />